Treatment of textile materials



of higher aldehydes such ydro tion of sodium removed by squeezing andthe Patented May 4, 1943 2,318,! TREATMENT OF TEXTILE MATERIALS WalterGlen Cameron and ThomasHenr Morton, Braintree, England, assignors toCourtaulds Limited, London,

P No Drawing.

reatBri England, a British com-v Application July 10, 1941, Serial No.

G tain August so, 1940 8 Claims. (Cl. 8-100) This invention relates tothe treatment of cellulose textile materials whereby their dyeingproperties are improved.

It has already been proposed to treat cellulose textile materials with asolution containing cyanamide and formaldehyde and thereafter to dry andheat the so-treated material in order on the material ormally used fordyeing wool. The use as acetaldehyde and isoheiwl aldehyde inconjunction with cyanamide has also been proposed for the same purpose.

We have now found that advantages are obtained by impregnating thecellulose textfle ma-- terial with a solution of cyanamide and analiphatic hydroxy aldehyde or hydroxy ketone with for without an acid.neutral and thereafter drying and heating the impregnated material.

Examples of hydroxy aldehydes and ketones which may be used are:glucose, aldol (Z-hydroxy butyraldehyde), diacetonealcohol (-i-methyl-4-xy-pentan-2-one) and the compound (1- hydroxy-butan-3-one) obtained bythe condensation of acetone and formaldehyde. These compounds are watersoluble and not readily volatile at ordinary temperatures.

If desired a small proportion of a phenolic compound such as resorclnolmay be added to the impregnating solution with improved results. Thematerial treated according to the present invention has a good afllnityfor those dyes usually used for dyeing wool and the material dyed withsuch dyes has a good fastness to washing and a very good fastness tolight.

' The following examples illustrate how the invention may be carried outin practice although the invention is not restricted Example 1 Asolution containing 3 and 3 per cent of aldol (2-hydrow-butyraidehyde)is adjusted to a pH value of 9 by the addihydroxide. 1 per cent ofpotassium carbonate is then added and staple fibre produced by theviscose process and sold under the registered trade-mark Fibro" with theresulting solution. Excess liquid is then material dried at 70centigrade for 20 minutes. It is then heated to 120 centlgrade for 10minutes and the resulting product has a marked ailinity for acid wooldyes, for example Azo Geranine 2G8, Coomassie Violet RS, Solway UltraBlue BS, Quinoline- Yellow AS, Erio fast yanine or alkaline catalyst,-

to these examples.

per cent of cyanamide is impregnatedan afilnity for those Orange G8. Thedyed material has a good fastness to washing and to light.

Example 2 Example 3 Material of the kind used in Example 1 is im- Ipregnated in a solution containing 3- per cent of s and Naphthalene .ingis then efiected for 15 drying and heating as cyanamide, 3 per cent ofaldol, 0.1 per cent of resorcinol and 0.1 per cent of sodium carbonatehaving a pH value of approximately 8. Impregnation, removal of excessliquid and rying. are carried out as in the previous examples andheatminutes at centigrade, whereupon material with similarly improveddyeing properties -is obtained.

Example 4 cent of cyanamide and adjusted to a pH value dilutehydrochloric a'cid. Afterimpregnation, in the previous examples,improved dyeing properties with respect to acid wool dyes are obtained.

What we claim is:

3 per cent of aldol is 1. A process for improving the dyeing'pr'operties of cellulosic textile material which com.- prisesimpregnating the said material with a solution of cyanamide and analiphatic compound selected from the group consisting of water solu-'ble hydroxy aldehydes andhydroxy ketones and then drying and heating thematerial. a

2. A process for improving the dyeing properties of cellulosic textilematerial which comprises impregnating the said material with as'olutionoi cyanamide, an from the group consisting of water soluble hydroxyaldehydes and hydroxy ketones and a small proportion of a drying andheating the material.

3. A process for improving the dyeing properties of cellulosic textilematerial which comprises corporating in the said of 4 by the addition ofaliphatic compound selected phenolic compound and then materialcyanamide and 6; A process for improving the dyeing properties ofcellulosic textile material which comprises impregnating the saidmaterial with a solution of cyanamide, 2-hydroxy-butyraldehyde and asmall proportion of resorcinol and then drying and heating the material.

7. A process for improving the'dyeing properties of cellulosic textilematerial which comprises impregnating the said material with a solutioncontaining cyanamide, an aliphatic compound selected from the groupconsisting of water solubie hydroxy aldehydes and hydroxy ketones and acatalyst and then drying and heating the material.

8. A process for improving the dyeing properties of cellulosic textilematerial which comprises impregnating the said material with a solutioncontaining cyanamide, an aliphatic compound selected from the groupconsisting of water soluble hydroxy aldehydes and hydroxy ketones, asmall proportion of a phenolic compound and a catalyst and then dryingand heating the material.

WALTER G. CAMERON. T. H. MORTON.

